M4 relief road, ecology surveys
Ove Arup and Partners Ltd

M4 relief road, ecology surveys

The brief

A relief road was proposed from Magor to Castleton in South Wales in order to ease rush hour congestion on the M4.

Ecology baseline surveys and protected species surveys were required in order to assess the impacts of the scheme on habitats and protected species which could be affected by the proposals.

What we did

  • We undertook an extended Phase 1 Habitat survey of the 24km route in order to map the habitats present and to provide an assessment of the site to support protected species, species of conservation concern and protected habitats.
  • A total of 400 water bodies were identified within 500m of the proposed route. These were subjected to Habitat Suitability Index (HSI) assessments to determine their suitability to support great crested newts.
  • 350 water bodies were considered to have the potential to support great crested newts, so were subject to further and more detailed surveys to determine the presence or likely absence of great crested newts.
  • The massive scale and complexity of carrying out this work, liaising directly with Natural Resources Wales and numerous landowners, and directing a large team of surveyors, resulted in the Thomson Ecology Project Manager and our in-house GIS team to create a bespoke database especially for this project. This database enabled the survey data, project progress and landowner contact details to be kept updated daily and extracted in report format to inform the client of progress.
  • Surveys were undertaken under licence from Natural Resources Wales.
The surveys and reports were completed on time and on budget, and allowed our client to plan their next steps with reliable and up-to-date ecological survey data.
Thomson project manager, M4 relief road ecology surveys
Our services
Environmental consultancy services covering all ecosystems

We cover all aspects of environmental consultation – from smaller surveys through to strategic projects.

Our culture and values
Our culture and R.I.S.E. values help bind us together as a business

At Thomson, we strive to deliver a pragmatic and innovative approach to environmental compliance.

Working in partnership with our clients, our team of environmental specialists ensures objectives are met, with maximum efficiency for our clients, and minimal impact on the natural world.

Projects M4 relief road, ecology surveys